This film should have been more than it was. The premise is great, the atmosphere is spot-on, the costumes and make-up are menacing and the characters are pretty decent. This menace is somehow lost, however, at some point during the overblown final plot-arc, which is a major shame because it really looks stunning and builds up some satisfying apprehension. I cannot give it less than three stars, but only because I absolutely love this sort of thing, having grown up with Wolfenstein and Doom to take me to the early hours. One day somebody will nail this idea and unleash true grim krieg.